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Effect of temperature in the conversion of methanol to olefins (MTO) using an extruded SAPO-34 catalyst

Ignacio Jorge Castellanos-Beltran, Gnouyaro Palla Assima, Jean-Michel Lavoie

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 226-238 doi: 10.1007/s11705-018-1709-8

Abstract: The methanol-to-olefin (MTO) reaction was investigated in a bench-scale, fixed-bed reactor using an extruded catalyst composed of a commercial SAPO-34 (65 weight percentage, wt-%) embedded in an amorphous SiO matrix (35 wt-%). The texture properties, acidity and crystal structure of the pure SAPO-34 and its extruded form (E-SAPO-34) were analyzed and results indicated that the extrusion step did not affect the properties of the catalyst. Subsequently, E-SAPO-34 was tested in a temperature range between 300 and 500 °C, using an aqueous methanol mixture (80 wt-% water content) fed at a weight hour space velocity (WHSV) of 1.21 h . At 300 °C, a low conversion was observed combined with catalyst deactivation, which was ascribed to oligomerization and condensation reactions. The coke analysis showed the presence of diamandoid hydrocarbons, which are known to be inactive molecules in the MTO process. At higher temperatures, a quasi-steady state was reached during a 6 h reaction where the optimal temperature was identified at 450 °C, which incidentally led to the lowest coke deposition combined with the highest H/C ratio. Above 450 °C, surges of ethylene and methane were associated to a combination of H-transfer and protolytic cracking reactions. Finally, the present work underscored the convenience of the extrusion technique for testing catalysts at simulated scale-up conditions.

Keywords: MTO     SAPO-34     temperature     extrusion     coke     light alkanes    

Insights into carbon-based materials for catalytic dehydrogenation of low-carbon alkanes and ethylbenzene

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1623-1648 doi: 10.1007/s11705-023-2328-6

Abstract: dehydrogenation with low thermal limit has been regarded as promising methods to solve the increasing demands of light

Keywords: carbon materials     dehydrogenation     active sites     mechanism     catalytic performance     support    

Prediction of the flash points of alkanes by group bond contribution method using artificial neural networks

PAN Yong, JIANG Juncheng, WANG Zhirong

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 4,   Pages 390-394 doi: 10.1007/s11705-007-0071-z

Abstract: which had the high ability of nonlinear of prediction, was established to predict the flash points of alkanesparameters of neural networks to study the correlation of molecular structures with flash points of 44 alkanesused not only to reveal the quantitative correlation between flash points and molecular structures of alkanes

Keywords: information     nonlinear     quantitative correlation     superior     molecular    

Photocatalysis: from solar light to hydrogen energy

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 565-567 doi: 10.1007/s11708-021-0784-6

A novel light fluctuation spectrum method for in-line particle sizing

Shouxuan QIN, Xiaoshu CAI, Li MA

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 89-97 doi: 10.1007/s11708-012-0176-z

Abstract: This paper discusses two problems in in-line particle sizing when using light fluctuation method.First, by retrieving the ratio of particle concentrations at different time, the intensity of incident lightThere exists narrow error between the calculated and pre-detected value of the intensity of incident light

Keywords: in-line measurement     particle size distribution (PSD)     incident light intensity     particle concentration     light fluctuation    

Plasmonic light trapping for enhanced light absorption in film-coupled ultrathin metamaterial thermophotovoltaic

Qing NI, Hassan ALSHEHRI, Yue YANG, Hong YE, Liping WANG

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 185-194 doi: 10.1007/s11708-018-0522-x

Abstract: However, the light absorption in ultrathin cells is usually very weak compared to the corresponding bulk

Keywords: metamaterial     thermophotovoltaic     plasmonics     light trapping     selective absorption    

HQ in inland saline-alkaline water under different light qualities

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-021-1479-2

Abstract:

• Optimal growth of Chlorella in inland saline-alkaline water was achieved by blue LED.

Keywords: Light quality     Chlorella     Inland saline-alkaline water     Fatty acid     Biodiesel property    

Effect of light scattering on the performance of a direct absorption solar collector

Kwang Hyun WON, Bong Jae LEE

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 169-177 doi: 10.1007/s11708-018-0527-5

Abstract: Therefore, for the DASC utilizing a plasmonic nanofluid supporting the LSP, light scattering from metallicIt is found that the light scattering can improve the collector performance if the scattering coefficient

Keywords: direct absorption solar collector     plasmonic nanofluid     light scattering    

Light olefins synthesis from С

Anton SHALYGIN, Evgenii PAUKSHTIS, Evgenii KOVALYOV, Bair BAL’ZHINIMAEV

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 3,   Pages 279-288 doi: 10.1007/s11705-013-1338-1

Abstract: A two-step process was employed to convert methane or ethane to light olefins via the formation of an

Keywords: oxychlorination     methane     ethane     light olefins     ruthenium catalyst    

Lignin-derived dual-function red light carbon dots for hypochlorite detection and anti-counterfeiting

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7,   Pages 966-975 doi: 10.1007/s11705-022-2244-1

Abstract: Furthermore, a new type of visible-light and fluorescence dual-channel information encryption platform

Keywords: alkali lignin     red light carbon dots     hypochlorite     encryption and anti-counterfeiting    

Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 1038-1050 doi: 10.1007/s11705-022-2279-3

Abstract: separately composited into the polyelectrolytes complex capsules to enhance thermal conductivity and light-to-thermalMoreover, studies involving light-to-thermal conversion determined that composite phase change materialsexhibited outstanding light-to-thermal conversion performance.

Keywords: cellulose     polyelectrolytes     phase change materials     thermal energy storage     light-to-thermal conversion    

Visible light responsive photocatalysts developed by substitution with metal cations aiming at artificial

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 568-576 doi: 10.1007/s11708-021-0774-8

Abstract: Efficient utilization of visible light comprised of solar light is essential for practical use.valence band, and formation of solid solution are often utilized as the useful methods to develop visible lightThis mini-review introduces the recent work on visible-light-driven photocatalysts developed by substitution

Keywords: visible light responsive photocatalyst     water splitting     artificial photosynthesis: metal ion substitution    

Instantaneous deflection of light-weight concrete slabs

Behnam VAKHSHOURI, Shami NEJADI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4,   Pages 412-423 doi: 10.1007/s11709-017-0416-8

Abstract: An experimental investigation is performed on four simply supported Light-Weight Concrete (LWC) one-way

Keywords: instantaneous deflection     light-weight concrete     expanded polystyrene     effective moment of inertia     cracking    

Nanostructured gold films exhibiting almost complete absorption of light at visible wavelengths

Hanbin Zheng, Christine Picard, Serge Ravaine

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 247-251 doi: 10.1007/s11705-018-1710-2

Abstract: The black gold films have remarkable optical behavior as they absorb more than 93% of incident light

Keywords: nanostructuration     light absorption     coating     gold     electrodeposition     anodization    

LIGHT INTERCEPTION AND USE EFFICIENCY DIFFER WITH MAIZE PLANT DENSITY IN MAIZE-PEANUT INTERCROPPING

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 3,   Pages 432-446 doi: 10.15302/J-FASE-2021403

Abstract:

Intercropping increases crop yields by optimizing light interception and/or use efficiency.Although intercropping combinations and metrics have been reported, the effects of plant density on lightHere, we examined the light interception and use efficiency in maize-peanut intercropping with differentThe mean total light interception in intercropping across years and densities was 779 MJ·mlight interception in the intercrops.

Keywords: dryland agriculture     light interception     light use efficiency     maize-peanut intercropping     semiarid    

Title Author Date Type Operation

Effect of temperature in the conversion of methanol to olefins (MTO) using an extruded SAPO-34 catalyst

Ignacio Jorge Castellanos-Beltran, Gnouyaro Palla Assima, Jean-Michel Lavoie

Journal Article

Insights into carbon-based materials for catalytic dehydrogenation of low-carbon alkanes and ethylbenzene

Journal Article

Prediction of the flash points of alkanes by group bond contribution method using artificial neural networks

PAN Yong, JIANG Juncheng, WANG Zhirong

Journal Article

Photocatalysis: from solar light to hydrogen energy

Journal Article

A novel light fluctuation spectrum method for in-line particle sizing

Shouxuan QIN, Xiaoshu CAI, Li MA

Journal Article

Plasmonic light trapping for enhanced light absorption in film-coupled ultrathin metamaterial thermophotovoltaic

Qing NI, Hassan ALSHEHRI, Yue YANG, Hong YE, Liping WANG

Journal Article

HQ in inland saline-alkaline water under different light qualities

Journal Article

Effect of light scattering on the performance of a direct absorption solar collector

Kwang Hyun WON, Bong Jae LEE

Journal Article

Light olefins synthesis from С

Anton SHALYGIN, Evgenii PAUKSHTIS, Evgenii KOVALYOV, Bair BAL’ZHINIMAEV

Journal Article

Lignin-derived dual-function red light carbon dots for hypochlorite detection and anti-counterfeiting

Journal Article

Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal

Journal Article

Visible light responsive photocatalysts developed by substitution with metal cations aiming at artificial

Journal Article

Instantaneous deflection of light-weight concrete slabs

Behnam VAKHSHOURI, Shami NEJADI

Journal Article

Nanostructured gold films exhibiting almost complete absorption of light at visible wavelengths

Hanbin Zheng, Christine Picard, Serge Ravaine

Journal Article

LIGHT INTERCEPTION AND USE EFFICIENCY DIFFER WITH MAIZE PLANT DENSITY IN MAIZE-PEANUT INTERCROPPING

Journal Article